diff --git a/bundles/crystal/metadata.py b/bundles/crystal/metadata.py
index efd513e..48c3eb9 100644
--- a/bundles/crystal/metadata.py
+++ b/bundles/crystal/metadata.py
@@ -4,7 +4,7 @@ defaults = {
             'crystal': {},
         },
         'sources': {
-            'deb http://download.opensuse.org/repositories/devel:/languages:/crystal/Debian_{version}/ /',
+            'deb https://download.opensuse.org/repositories/devel:/languages:/crystal/Debian_{version}/ /',
         },
     },
 }
diff --git a/groups/os/debian-10.py b/groups/os/debian-10.py
deleted file mode 100644
index 54a700a..0000000
--- a/groups/os/debian-10.py
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-    'supergroups': [
-        'debian',
-    ],
-    'metadata': {
-        'apt': {
-            'sources': {
-                'deb http://security.debian.org/debian-security {release}/updates main contrib non-free',
-            },
-        },
-        'php': {
-            'version': '7.3',
-        },
-        'postgresql': {
-            'version': '11',
-        },
-        'os_release': 'buster',
-    }, 
-    'os_version': (10,),
-}
diff --git a/groups/os/debian-11.py b/groups/os/debian-11.py
index 6720190..caf08aa 100644
--- a/groups/os/debian-11.py
+++ b/groups/os/debian-11.py
@@ -3,11 +3,6 @@
         'debian',
     ],
     'metadata': {
-        'apt': {
-            'sources': {
-                'deb http://security.debian.org/ {release}-security main contrib non-free',
-            },
-        },
         'php': {
             'version': '7.4',
         },
@@ -15,6 +10,6 @@
             'version': '13',
         },
         'os_release': 'bullseye',
-    }, 
+    },
     'os_version': (11,),
 }
diff --git a/groups/os/debian-12.py b/groups/os/debian-12.py
index 13eb92d..0aff049 100644
--- a/groups/os/debian-12.py
+++ b/groups/os/debian-12.py
@@ -3,11 +3,6 @@
         'debian',
     ],
     'metadata': {
-        'apt': {
-            'sources': {
-                'deb http://security.debian.org/ {release}-security main contrib non-free',
-            },
-        },
         'php': {
             'version': '8.1',
         },
@@ -15,6 +10,6 @@
             'version': '14',
         },
         'os_release': 'bookworm',
-    }, 
+    },
     'os_version': (12,),
 }
diff --git a/groups/os/debian.py b/groups/os/debian.py
index 4ac57c1..69c32f5 100644
--- a/groups/os/debian.py
+++ b/groups/os/debian.py
@@ -9,9 +9,10 @@
     'metadata': {
         'apt': {
             'sources': {
-                'deb http://deb.debian.org/debian {release} main contrib non-free',
-                'deb http://deb.debian.org/debian {release}-updates main contrib non-free',
-                'deb http://deb.debian.org/debian {release}-backports main contrib non-free',
+                'deb https://deb.debian.org/debian {release} main contrib non-free',
+                'deb https://deb.debian.org/debian {release}-updates main contrib non-free',
+                'deb https://deb.debian.org/debian {release}-backports main contrib non-free',
+                'deb https://security.debian.org/ {release}-security main contrib non-free',
             },
             'packages': {
                 'mtr-tiny': {},